body {
    font-family: sans-serif;
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: #333;
    color: #fff;
    padding: 1rem;
    text-align: center;
}

main {
    flex: 1;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

footer {
    background-color: #333;
    color: #fff;
    padding: 1rem;
    text-align: center;
    width: 100%;
}

/* Media query for responsive design */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.5rem;
    }

    main {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.2rem;
    }
}